Respected enough to conquer the Mobos, pop enough to wake the nation on GMTV a few weeks ago – it's been a big old year for N-Dubz. After a few hundred thousand records and a No 1 single (Number One with Tinchy Strider), the North London trio are probably the biggest non-guitar group in the country. To cement that fact, they're on album number two just 12 months after their first. Even Gary Barlow has jumped aboard to help out with the songwriting duties on No One Knows. As with Dappy and Co's debut, it's all teenage dilemmas (cheating boys, searching for girls after a night out, accidental pregnancies) told in a mixture of careening male/female raps and vocals presented over polished electronic beats with help from guests including Mr Hudson, Chipmunk and Wiley. While it's hardly exploding with originality, and the various references to Facebook and how many records they've sold do grate, this is a record brimming with vitality and chutzpah. N-Dubz are bound to be inescapable in 2010 – most probably because they will be being blasted out of a mobile phone on the bus – but the point remains.